Samuel c



S. 0. BROWN. MORTISING MACHINE.

No. 65,996. Patented June 25, 1867'.

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SAMUEL 0. BROWN, OF RICHMOND, INDIANA, ASSIGN OR TO J. A. FAY 66 (30., OF CINCINNATI, OHIO.

Letters Patent Milanese, dated June 25, 1867.

IMPROVEMENT IN MORTISING MACHINE.

T0 ALI: when IT MAY CONCERN:

Be it known that I, SAMUEL 0. BROWN, of the city of Richmond, county of Wayne, and State of Indiana, have invented a new and'uscful Improvement in Machines for Mortising Window-Blinds, &c. and I do hereby declare that the following is a'full, clear, andexact description of the same, reference being had to the annexed drawings, making a part of this specification, in which Figure 1 is a perspective view.

Figure 2 is a view of the supporting section. Figuro 3, a view of the adjustable section.

Figure 4, a side viewof the saw; and

Figure 5, an cdgeyiew of the same.

Similar letters of reference, when they occur in the difi'erent figures, represent corresponding parts of the machine.

My invention consists in constructing a blind-mortising' machine in such a manner that theoperation of mortising is materially simplified, the cutting being done with a saw, which is so constructed and arranged as to do the work of cutting a mortise effectually at a single operation, and is so attached, by suitable and eiiicient devices, that it may easily be adjusted after cutting one stile, to a position to cut the opposite stile for the same blind. i

. To enable others skilled in the art to ma'ke and use my invention, I'will proceed to describe it with reference to the drawings. I p

r 1: represent the bed-plate or support, on a vertical or right-angular extension of which is formed a ring, as shown in fig. 2. 7t represents an annular face-plate, equal in circumference to ring 1', andis provided with a. flange,lt, fig. 3, which flange is circular, fitting the cavity in ring 1', and serving as an axle to face plate '21. When plate at is in position, the screws or bolts e ande serve to retain it, the screws orbolts being secured to bed-plate r through the screw-holes or openings 1' and 2', shown in fig. 2. The extension g of the box d nearly reaching the saw in rear of. mandrelp is to support the latter from yielding to the; pressure, when the saw f is being operated. No corresponding extensionof the journal or box is needed in front of the mandrel, consequently the saw is permitted to cutin depth to nearly half its diameter-,it being desirable to make the mortise as nearly a half circle as possible. sides of s awjare concave, as shown in fig. 5 in consequence of which the teeth at the circumference of the saw are somewhat the thickest; and-in order that filing the saw may not diminish the thickness of the teeth, and thereby ruin the saw, their thickness is made the same from front to rear, in consequence of which. the saw is liable to heat by friction. To prevent the heating of the saw, I groove the teeth to a slight depth transversely to the line of their motion, as she mi in figs. 1 and 4. f,=fig. 1, represents the saw in one of its positions, the stile being laid, for mortising, parallel to guide 8. The mortise is thercbycut obliquely, to suit one side of the blind. Tocut the opposite stile, plate n is turned on its axle of flange b, bringing the saw to a corresponding position on the opposite side of a verticalline. The distance to which plate 7: may be turned is regulated 'by the slots .9 and c. The saw is held in position by the screws or bolts 0 and e, which l-atter, being tightened, prevent face-p1ate n, to which the sawis secured, from timing. The belt fo r driving the saw works from the rear, through the cavities in plates r'and 71-, over pulicy m. The screws or bolts e and e bcingon a line, or nearlyso, with the horizontal diameters of plates r and n, the plate 1: may be reversed, turning thesaw upwards. If itis found desirable to do so, the machine may be placed with the mandrel horizontal, ahd the saw working vertically, or in any desired position. The bed-plate rris secured by screws, or in any convenient manner, to a,suitable bench for working the machine,

Having thus fully described my said invention, what I claim, and desire to secure by Letters Patent, is

The cuttcrj, shaft p, and pulley m, attached to the flanged plate n, when said plate is made adjustable upon the bed-plate r, substantially in the manner and for the purpose set forth.

a SAMUEL C. BROWN.

Witnesses:

J'osnrn RIDGE, WM. It. WEBSTER. 

